The french monarchy also had the tradition of keeping the heart of a king on display except the only one to not have his heart out was King Louis XV and even the son of King Louis XVI, Louis Charles the proclaimed Louis XVII heart in a Case like that of his ancestors, to me it's weird but it's their tradition.

The majority of French King and Queen's remains were buried at Saint Denis outside Paris,whilst their hearts and entrails were buried at another Abbey or Church with a separate monument.

Example : Heart Monument of Henri II of France,commissioned in 1561 by his widow,Queen-Regent of France Catherine de Médicis.It was originally housed at the now destroyed l'église des Célestins de Paris.

Unlike other French Monarchs and Consorts,Louis XI was not buried at Saint Denis.He was buried at the Basilique Notre-Dame de Cléry-Saint-André near Orléans.His tomb suffered damaged in 1562 when the church was sacked by the Huguenots and again during the French Revolution.

His sister,Anne de France ruled as his Regent from 1483 until 1491.Charles was buried at Saint Denis Basilica outside Paris,however his tomb was ransacked and destroyed in August 1793 during the French Revolution.

Quite a lot of French Royal Tombs were destroyed & lost forever following the French Revolution,many of the churches too have been demolished .Whilst St Denis Abbey was reserved for Monarchs,consorts and their children/spouses many churches in Paris were used as burial sites for the cadet branches of the French Royal Family & contained many Princely & Royal Tombs.

Tomb of Charles d'Évreux,Comte d'Etampes at the now destroyed Église des Cordeliers de Paris.Charles d'Évreux was a French Prince who was also a grandson of Philip III the Bold of France.Charles died in September 1336.